Concrete-distributing machine.



V TESCHAN. CONCRETE DSSTRIBUUNG MACHINE.

APPLICATIGN FILED NOV. 21, lS

Cra

@FEET/E@ CGNCRETE-DSTRBUTING MACHINE.

Specification of Letters Patent.

ertented June el, 193g.,

Application filed November 27, 1917. Serial No'. 204,158.

To cil wiom t may concern:

Be it known that i, Namen F. TnsoHAN, a citizen of the United States, and resident ot' Milwaukee, in ithe county of Milwaukee and State of lii/visconsin, have invented new and useful improvements in Concrete-Dis tributing lll'achiues, or which the 'ollowing is a description, reference being had to the accompanying drawings, which are a part 'of this specification.

The invention relates to concrete handling apparatus.

The invention is more particularly designed to provide a concrete- `distributing mechanism ci the boom and bucket type with simple and eilicient mechanism for dumping the bucket at different positions on the boom and then restoring the bucket to operative position for receiving a charge from the concrete mixer. Devices of this kind are particularly adapted for laying concrete road the boom being capable of swinging laterally and the bucket being movable to different positions along the boom so that the concrete may be distributed over a large area without changing the position of the mixer.

The invention further consists in the several features hereinafter set forth.

ln the, drawings:

Figure l is an elevation View of the device embodying the invention showing it in connection with the concrete mixer, the bucket being shown in dotted lines in discharging position;

2 is a section taken on the line 2-2 or Fig. 1;

Fig. 3 is a detail plan view ol thebucket and the rear end of the boom;

Fig. #l is a detail view olt the tripping mechanism of the bucket, showing it in position just before the operation is completed.

in the drawings, the numeral 6 represents the frame of the mixer, 7 the mixing drum, 8 the discharge trough for the mixer, and 9 the boom as a whole, said boom being capai ble ot swinging laterally and verticallyA The boom i) consists of a pair of spaced apart connected' together channel bars 10 forming a trackway. At their rear ends these bars carry brackets l1 through which a pivot pin l2, carried by a member 13, passes so that the boom may be raised and lowered in a vertical plane. The member 13 extends upwardly and is connected to a turntable l-l carried by the frame 6 so that the boom may be swung in a horizontal plane. Means are provided for raising and lowering the boom consist-ing of a hand-operated winch l5 provided with a rope i6 which extends back to a pulley (not shown'l' carried by the frame ot' the machine and thence extends downwardly at 17 and is connected to a clevis 18 pivotally secured at its @nd adjacent the outer side of the channel ars. r

A carriage 19 is provided with a pair of flanged wheels 2G which are mounted upon the track way formed by the channel bars 10, and a dumpable .bucket 2l is secured to said carriage by brackets 22 and 23.

The bucket 2l is of the openable bottom type provided with bottom doors 24 pivotally secured at their outer side edges tothe adjacent, sides of the bucket, the sides of thel bucket being inclined toward the bottom to facilitate the discharge of material therefrom.

The doors of the bucket are held closed by means ol? a bail secured at its ends to the inner edges of the doors and intermediate their ends to the depending curved end of a link 26 which is. pivotally secured to a crank 27 mounted on a shaft 28 pivotally mounted in the carriage 19. The arrangement of the bail 25, link 26 and crank 27 is such that when the shaft 28 is rotated to swing the link 26 and crank 27 to the right and over dead center, as shown in F ig. l, the doors are held closed by their own weight and by the weight ot the material -within the bucket as the linkage is locked against movement. Whcnthe shaft is rotated to swing the link 26 and crank 27 to the left over dead center, the weight of the load will open the doors of the bucket to discharge the load. The bucket may be manually opened and closed by a hand lever 29 mounted on the shaft 28. A stop 27 limits the forward movement of the crank 27.

The carriage is moved in or out along the boom bymeans of a cable 30 which is actuated by any suitable power means (not shown). This cable is connected at one end 31. to the carriage 17 and thence passes over aguide pulley 32 and upwardly over a drinn (not shown) which is driven by suitable power and thence passes downwardly over a pulley 33 from there through an opening 3d in the carriage, thence around a pulley 35 mounted at the forward end of the boom and is secured at its other end 36 to the carriage.

The means for autolmitically dumping the bucket in any position upon the boom comprises means for rotating the shaft 28 to throw the linkage for the doors of the bucket over dead center to open the doors when desired. This consists of a two-part crank member comprising a'- crank 3T secured to the shaft 28 and a trip arm or lever 38 pivotally secured to said crank b-y a pin 39 and yieldingly held against n-lovement by a coiled spring 4() mounted on the pin '39 and having its ends 4l and 4i). crossed, the end 4l yieldingly bearing upon a. projection 43'on the lever 38 and the end 42 yieldingly bearing upon a projection 44 on the crank 37.- The lever 38 has a beveled end 45 which may "frictionally engage the bottom side of one of the channel bars 10 or which may engage projections 4G on the boom formed by bolts spaced a predetermined distance apart lith this construction as the carriage 1s moved forwardly along the boom the lever 38 rides along the under surface of the boom, the lever 38 and crank- 37 being inclined backwardly as shown in Fig. l, and the lever 38 rides. over the projections 46 on the boom because-of the yielding connection with the arm 37. When the carriage and bucket have been moved t0 the desired position on the boom and the bucket is moved backwardly the lever 38 engages the first projection 46 it comes in Contactl with and on a further backward movement of the carriage the lever 3S moves inwardly moving the crank 37 downwardly thereby turning the shaft 28 to throw the link 26 over dead center as .shown in Fig. 4, after which the weight of The means for restorin the bucket to operative position consists of means for throwing the door. opening and closing linkage over dead center on a reversal of the carriage and consists of the lever 29 which carries a roller 47 that engages a cam 48 carried by the boom and throws the linkage back to load receiving position before the carriage reaches the end of its rearward' travel upon the boom. The weight of the lever 29 is counterbalanced by a coiled spring 49 secured at one end to the shaft 28 and at its other end to the carriage 19.

With the foregoing construction the concrete after mixture is discharged through the trough 8 into thc bucket v2.1 and the bucket moved out along the boom to the desired place of deposit. On the backward movement ofthe carriage the tripping mechanism above described opens the doors of the bucket to dischargeI the load and the empty bucket is then moved inwardly upon the boom and the doors are closed before '1t reaches its charging position and while it is in charging position the doors are held closed because of the arrangement of the linkage.

It will be noted that the trip means for discharging the bucket is entirely independent of the cable and any other means besides the cable could be used tov move the carriage along the boom.

l am aware that the details of the construction hcrein shown and described are capable of some modification and change and I therefore desire it'to be understood that such changes in construction as come within the scope of the appended clai1ns,.I deem to be within the spirit of my invention,

What I claim as my invention is:

1. In a concrete' distributing apparatus,'

the combination, with -a boom and a carriage movable back and forth along the same, of a dumpable bucket carried by the carriage, and means inoperable on the forward movement of the' carriage and engaging the boom on the backward movement of said door-operating means engaging the' boom on the backward movement of the carriage to move said door operating-means to open said doors. Y

3. In a concrete distributing apparatus, the combination, with a boom and a carriage movable back and forth along the same, of a bottom dump bucket, means for opening and closing the bottom of said bucket, including a rotatable shaft, and automatic trip means, for turning said shaft to discharge the bucket, inoperable on the forward movement of the carriage and operable by engagement with the boom on the backward movement of the carriage.

4.111 a concrete distributing apparatus, the combination, with a boom and al carriage movable back and forth along the same, of a bottom dump bucket, means for opening and. closing the bottom `of said bucket including a rotatable shaft, and automatic trip means including a two-part crank arm carried by said shaft, the parts of said crank beinganovable with respect t0 cach other, one part of said crank engaging the boom on the backward movement of the carriage to turn said shaft to discharge the bucket.

5. In a concrete distributing apparatus, the combination with a boom and a carriage movable back and forth along thesame, of a bottom dump bucketnneans for opening and closing the bottom of said bucket in,

' GUET:

Leeeeee ebe shai amd eutometio mi@ eeespmsmg a "ampere crank arm e" wie@ by shaft, the peres oi 'said omnk 1l Aer, one ,peet of said crank engaging oom en the backward movement eht-he cxi'ggage e tum sind shaft to discharge the bucket.

inatlon.; wltn a boom and eemlege movable beek and fosfth along @he same, of

e, bucket preffided. with dumping;v bottom end aeped to engage boom to tmp the oef opemtng'meens io disehexge 'ehe bucket., y

7. :in e concrete distrbu'eng machine, the combi'naon' with e boom and e ceriege movable 'beek :md ereh aong the same7 of e bucket provlded with dumpmg doors, doeoperating meanscompl'sng e shaftE e Creek@ and mkege colmecmg saldi erenk 'mth seid dom-s, u utomee trip means nopez'abe en the forward movement of the carriage an@ engaging the boom on Ythe rearward; move ment of the carriage fol' opening seid deofs5 and means o' autometcely closing the doors.

in testimony whereof,

` X `ax my sgneture WALTER F, TESCHN. 

